Each industry has a financial norm around which companies within the industry tend to operate. An airline, for example, would naturally be expected to have a high proportion of fixed assets (airplanes), while a consulting firm would not. A steel manufacturer would be expected to have a lower gross margin than a pharmaceutical manufacturer because commodities such as steel are subject to strong price competition, while highly differentiated products like patented drugs enjoy much more pricing freedom. Because of unique economic features of each industry, average financial statements will vary from one industry to the next.